Coffee filter ring



FIG. 1 is a top plan view of a coffee filter ring showing my new design;

FIG. 2 is a side view of the coffee filter ring.

FIG. 3 is a rear view of the coffee filter ring; and,

FIG. 4 is an environmental perspective view thereof.

The broken lines in FIG. 4 are included for the purpose of illustrating environment and form no part of the claimed design. 

The ornamental design for a coffee filter ring, as shown and described. 